Hello,
with the latest snapshots it isn't possible to open the frontend device
of cx88-dvb multiple times. I used this to monitor signal quality with
an external tool (femon).
With the attached patch it's working again. Is it ok if the same
hardware on the transport bus is used more than once?
regards, Roland
--- v4l-dvb.orig/linux/drivers/media/video/cx88/cx88.h 2007-01-01 14:11:59.000000000 +0100
+++ v4l-dvb/linux/drivers/media/video/cx88/cx88.h 2007-01-02 23:30:54.000000000 +0100
@@ -351,6 +351,7 @@
/* cx88-video needs to access cx8802 for hybrid tuner pll access. */
struct cx8802_dev *dvbdev;
enum cx88_board_type active_type_id;
+ int active_ref;
};
struct cx8800_dev;
--- v4l-dvb.orig/linux/drivers/media/video/cx88/cx88-mpeg.c 2007-01-02 22:41:56.000000000 +0100
+++ v4l-dvb/linux/drivers/media/video/cx88/cx88-mpeg.c 2007-01-02 23:53:58.000000000 +0100
@@ -639,12 +639,15 @@
struct cx88_core *core = drv->core;
/* Fail a request for hardware if the device is busy. */
- if (core->active_type_id != CX88_BOARD_NONE)
+ if ( core->active_type_id != CX88_BOARD_NONE &&
+ core->active_type_id != drv->type_id )
return -EBUSY;
- if (drv->advise_acquire)
+ if ( core->active_type_id == CX88_BOARD_NONE &&
+ drv->advise_acquire )
{
core->active_type_id = drv->type_id;
+ core->active_ref++;
drv->advise_acquire(drv);
mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __FUNCTION__, cx_read(MO_GP0_IO));
@@ -658,7 +661,7 @@
{
struct cx88_core *core = drv->core;
- if (drv->advise_release)
+ if ( drv->advise_release && --core->active_ref == 0)
{
drv->advise_release(drv);
core->active_type_id = CX88_BOARD_NONE;
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